Merge "Add license text." am: 7d19e80b75 am: 4c188b76a2 am: 7a5935cbcd Original change: https://android-review.googlesource.com/c/platform/external/ppp/+/1960360 Change-Id: I03e4b5b5093be8269f5adbcce2e62d5aef611464